I've been looking for spare pedals over years. With very frustrating result every time.
I don't know of any other pedals than the Fanatec CSP V3 that have a complete USB controller built in. So, all the other pedals need a particular wheel to function.
Apart from that, all of them are ridiculously priced.

Ed: Im wondering where u got that 70 pounds from. The official shipping cost to Scotland, according to their chart, would be 22.75 €, roughly, 18 GBP.

Hi Michael,
thank you for your enquiry.
The CSR Pedals unfortunately are not compatible with a Thrustmaster wheel. They only work via a Fanatec wheel
Best regards / Freundliche Grüße
Johannes Limoli-Kirsch
(Fanatec Support Team)

I've emailed Fanatec to see what they say, as I just tried again and it came up with the same cost, will wait and see what they say, if they can do it for a reasonable price then I'll go ahead and get them